We're using Opinew Product Reviews at https://homeontheswan.com/
Importing individual products works great! Unfortunaltey the mass import is not functioning for us. If that's something Opinew can resolve it'll be a 5 star product.

Ele é bom, o complicado é que não há possibilidade de importar somente comentários de um pais especifico e os nomes das pessoas que comentaram não são editáveis, então fica um comentário com nome de pessoas de outros países.

The app is great - when it works. I've used it on a couple of my stores and every store has had problems with reviews randomly disappearing... Yesterday I was left with just 3 reviews out of the few hundred I imported on one store - which looked bad for customers. Support is a bit sketchy. They acknowledge something is wrong - and then...do nothing happens to fix the problem!